Daikin D2CNL-A1A, Installation Manual

Table of contents

Installation Manual

3

D2CNL024A1AA
Wall-mounted condensing boiler
3P469346-12R – 2021.09

Table of contents

1 Introduction

3

1.1

About the documentation ..........................................................

3

1.1.1

Meaning of warnings and symbols..............................

3

1.2

Identification label......................................................................

3

1.3

Symbols on the package ...........................................................

4

2 Safety instructions

4

3 About the unit

4

3.1

Safety systems ..........................................................................

4

3.2

Dimensions................................................................................

5

3.3

Components ..............................................................................

6

3.4

Technical specifications ............................................................

7

4 Installation

8

4.1

To open the unit ........................................................................

8

4.2

Installation site requirements.....................................................

9

Minimum installation clearances .................................

9

4.3

To unpack the unit.....................................................................

9

4.4

To mount the unit ......................................................................

10

4.5

Central heating system requirements........................................

10

4.6

Underfloor heating requirements...............................................

11

4.7

Residual pump lift graph............................................................

11

4.8

Connections ..............................................................................

11

4.8.1

Piping connections...................................................... 11

4.8.2

Guidelines when connecting the gas piping................ 11

4.8.3

Guidelines when connecting the water piping............. 12

4.8.4

Guidelines when connecting the electrical wiring ....... 12

4.8.5

Guidelines when connecting options to the boiler....... 13

4.8.6

Wiring diagram............................................................ 14

4.8.7

Guidelines when connecting the condensate piping... 15

4.8.8

Guidelines for condensate piping termination............. 15

4.8.9

Guidelines when connecting the boiler to the flue gas
system......................................................................... 16

4.8.10

Applicable flue systems .............................................. 16

4.9

To fill the system with water ......................................................

21

5 Commissioning

21

5.1

To fill the condensate trap .........................................................

21

5.2

To check for gas leakage ..........................................................

21

5.3

To commission the unit .............................................................

21

5.3.1

To commission the central heating ............................. 22

5.3.2

To measure the flue emissions to make gas-air ratio
adjustment .................................................................. 22

5.3.3

To commission the central heating capacity setting ... 22

5.3.4

To commission the domestic hot water....................... 22

6 Hand-over to the user

22

Disposal

Old units must be appropriately disposed of, in accordance with local
and national regulations. The components are easy to separate and
the  plastics  are  marked.  This  allows  the  various  components  to  be
sorted for appropriate recycling or disposal.

▪ Units are marked with the following symbol:

This  means  that  electrical  and  electronic  products  may  NOT  be
mixed  with  unsorted  household  waste.  Do  NOT  try  to  dismantle
the  system  yourself:  the  dismantling  of  the  system,  treatment  of
the  refrigerant,  of  oil  and  of  other  parts  MUST  be  done  by  an
authorised installer and MUST comply with applicable legislation.

Units MUST be treated at a specialised treatment facility for reuse,
recycling  and  recovery.  By  ensuring  this  product  is  disposed  of
correctly, you will help to prevent potential negative consequences
for  the  environment  and  human  health.  For  more  information,
contact your installer or local authority.

1

Introduction

1.1

About the documentation

The  instructions  contained  in  this  document  are  intended  to  guide
you  through  the  installation  of  the  unit.  Damage  caused  by  non-
observance  of  these  instructions  are  not  under  the  responsibility  of
Daikin.

▪ The  original  documentation  is  written  in  English.  All  other

languages are translations.

▪ The  precautions  described  in  this  document  are  written  for

installers  and  they  cover  very  important  topics.  Follow  them
carefully.

▪ Please read the operation manual and installation manual prior to

use and keep them for future reference.

1.1.1

Meaning of warnings and symbols

DANGER

Indicates a situation that results in death or serious injury.

WARNING

Indicates  a  situation  that  could  result  in  death  or  serious
injury.

CAUTION

Indicates a situation that could result in minor or moderate
injury.

NOTICE

Indicates  a  situation  that  could  result  in  equipment  or
property damage.

INFORMATION

Indicates useful tips or additional information.

1.2

Identification label

You  can  find  data  about  the  unit  on  its  identification  label,  which  is
located at the bottom of the right cover of the unit.